21220112212202 has 8 divisors (see below), whose sum is σ = 31852105034112. Its totient is φ = 10602743867500.

The previous prime is 21220112212177. The next prime is 21220112212207. The reversal of 21220112212202 is 20221221102212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21220112212207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3656115674 + ... + 3656121477.

It is an arithmetic number, because the mean of its divisors is an integer number (3981513129264).

Almost surely, 2^{21220112212202} is an apocalyptic number.

21220112212202 is a deficient number, since it is larger than the sum of its proper divisors (10631992821910).

21220112212202 is a wasteful number, since it uses less digits than its factorization.

21220112212202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7312238604.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21220112212202 its reverse (20221221102212), we get a palindrome (41441333314414).

The spelling of 21220112212202 in words is "twenty-one trillion, two hundred twenty billion, one hundred twelve million, two hundred twelve thousand, two hundred two".